Flashproxy is a nice idea, but it's for running a bridge in your browser. The purpose is to help censored people in places like Iran. You won't push a lot of traffic through your residential connection, and only bridge users will use it in the first place, which is about 5% of Tor users. To add substantial bandwidth to the network, and especially to diversify it, we need to run relays around the world, on continents outside of North America and Europe, and ideally those relays will be pushing more than 100 GB of traffic per month.